Device and method for preparing a recess in a bone

a technology for preparing bones and bones, applied in the field of bone preparation recesses or holes, can solve the problems of increasing pain for patients, affecting the healing process, and inconvenient use of single recess screws,

Inactive Publication Date: 2008-10-30
STRYKER EURO OPERATIONS HLDG LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]One aspect of the present invention is to provide a punching device for preparing a recess in a bone, a punching tool adapted to be used in such punching device or an implant adapted to be used as a punching tool for such punching device. A method

Problems solved by technology

Due to this circular cross-section, a single recess-screw-combination is not suitable to accommodate rotation forces applied around the axis of

Method used

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  • Device and method for preparing a recess in a bone
  • Device and method for preparing a recess in a bone
  • Device and method for preparing a recess in a bone

Examples

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Embodiment Construction

[0037]As schematically shown in FIG. 1, a punching device 1 according to an embodiment of the invention comprises an ultrasonic generator 3 controlled via a control 5, an ultrasonic sonotrode 7 and a punching tool 9.

[0038]The ultrasonic sonotrode 7 is coupled to the ultrasonic generator 3 via a fixation mechanism 11 which can comprise for example a frame 13 and a clamping screw 15. The ultrasonic generator 3 is adapted to emit ultrasonic vibrations with an adaptable frequency of e.g. 20 to 50 kHz which are transmitted to the sonotrode 7. The arrow A in FIG. 1 indicates a direction of these ultrasonic vibrations. Furthermore, the ultrasonic generator 3 may be adapted to produce ultrasonic vibrations with a selectable amplitude of between 5 and 100 μm along the direction A.

[0039]The punching tool 9 is coupled to the ultrasonic sonotrode 7 via a further fixation mechanism 17 which can comprise a clamping screw 19. Thereby, the ultrasonic vibrations can be transmitted from the sonotrode...

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Abstract

A punching device for preparing a recess in a bone has a punching tool usable for such a punching device. An implant usable with the punching tool is provided and a method for preparing a recess in a bone are disclosed. The punching device comprises an ultrasonic sonotrode and a punching tool which is fixable to the sonotrode at its proximal extremity. At its distal extremity, the punching tool has a thin-walled portion having a non-rotational symmetric cross-section. By ultrasonic vibration of the punching tool, the thin-walled portion can be forced into a bone thereby preparing a recess of which is not rotationally symmetric. Subsequently, an implant can be held in such recess. Due to its lack of rotational symmetry, the implant may absorb rotational forces around its longitudinal axis.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of the filing date of U.S. Provisional Patent Application No. 60 / 926,884 filed Apr. 30, 2007, the disclosure of which is hereby incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]The invention relates to preparing recesses or holes in bones of humans or animals. In such recesses or holes implants e.g. in the form of screws may be introduced. Such screws may be used for example to treat fractures of bones.[0003]Conventionally, the recesses were generally drilled with a rotating tool and both the recesses and the screws or pins to be inserted therein usually have a circular cross-section. Due to this circular cross-section, a single recess-screw-combination is not suitable to accommodate rotation forces applied around the axis of the screw. In order to accommodate such rotation forces which may occur for example when fixing two parts of bones together or when fixing an implant to a bone, it ...

Claims

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Application Information

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IPC IPC(8): A61H1/00A61B17/14
CPCA61B10/025A61B17/1604A61B17/32053A61B2017/00004A61B2017/00371A61B17/320068A61B17/864A61B17/8894A61B2017/320072
Inventor DORAWA, KLAUS
Owner STRYKER EURO OPERATIONS HLDG LLC
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